Ring roll



RING ROLL Filed June 9,' 194,7'y

n .EE 0.

zZ w( INVENTOR.

AWK

a A A n a W o n W 4 ,W Q ,f ,f/u., W www. n i 1W, a .QM E: t W w F wf@ dATTORNEY Patented Aug.` 3, 1948 oFFicE g RING ROLL v l Louis D. Clark,Rock C1-eek, Ohio f Application June 9, 1947, serial No. 753,440

7 Claims. (Cl. 69-13) My invention relates to ring rolls, morerparticularly to ring rolls for leather splitting machines, and theprincipal object of my invention is to provide new and improved ringroll constructions. 4

In the splitting of material, particularly of leather, the ring rollconstruction must be such that the ring sections are individually freeto vary in proportion to locally thickened portions of the materialbeingsplit, yet to return to position when such thickened portion is passed.

Prior to this invention, the art has made an attempt to provide asatisfactory ring roll construction, and the patent to J. A. Meyer,Number 1,586,100, May 25, 1926, is an example of prior art construction.

However, actual operating tests of such prior art constructions haveindicated that they are wanting in many respects. For example, in theMeyer patent referred to, a rubber shoe is interi posed between a ringsection and a shaft carrying the ring section, the rubber shoe beingcarried by an inner section. This 'construction required that the rubbershoe be stretched suiciently so that it may be assembled with the innersection, and in some cases such stretching caused serious distortion ofthe rubber shoe. In any event, such construction causes considerablediculty in assembly and disassembly operations during'cleaning of the,ring roll construction.

Further, the hides after treatment prior to the splitting operation maystill be wet, and moisture, dirt, grease and the like has a tendency toenter the ring section and deteriorate the rubber shoe .and also `creepbehind the rubber shoe and thus cause the ring section to run offcenter. When such conditions existed, the ring roll could no longer beused. 4

, Tests on the ring roll construction provided by my invention haveshown that such construction will give far longer service withoutattention, and when cleaning was required, the component parts werereadily removable and replaceable without repairs. It will beappreciated that a ring roll of my improved constructionv has a. highdegree of utility, since improper functioning of the ring rollconstruction during the splitting of a hide materially lessens the valueof the hide, thus increasing manufacturing costs because of spoilage andbecause of increased labor cost.

In the drawing accompanying this application and forming a part of thisspecication, there is shown, for purposes of illustration, an embodimentwhich my invention may assume, and in this drawing:

Figure 1 is a longitudinal sectional view showing a `ring roll incombination with a leather splitting machine of a commercial type, iFigure 2 is alfragmentary elevational view of my improved ring roll, vFigure 3 is an enlarged longitudinal sectional view through the ringroll, parts being shown in elevation,

Figures 4 and 5 are views showing relative positions of the adjoiningring sections of the ring roll.

Referring particularly to Figure l, the leather splitting machinetherein disclosed comprises a frame I having a table Il upon which thehide to be split is fed toward the band-type splitting knife l2. A gaugeroll I3 is carried by a suitable support It, which is adjustable so thatthe gauge roll i3 may be adjustedto accommodate hides of' variousthicknesses. The ring roll I5 is freely carried by a rubber back up rollI6.

In operation, the hide is'fed along the table Il in the direction shownby the arrow il, the gauge roll I3 and ring roll I5 feeding the hidetoward the band knife i2, the even split of the hide passing outwardlythrough a passage i8, and the i. remainder of the hide passingdownwardly along a slide i9.

In this particular illustration, the ring roll i5 is driven only byfrictional contact with the driven rubber roll t6. The ring roll bearsagainst the uneven side of the material to be split and takes upinequalities of material thickness by sinking into the rubber roll i6.The ring roll 1s further supported by engagement with an adjoining partof the slide i9. To prevent the ring roll l5 from creeping endwise, oneor both of its ends may bear against hardened inserts, carried by theframes as shown at `2t.

The ring roll i5 herein' shown to disclose an embodiment of my inventioncomprises Va shaft 2i having threaded ends 22 and 23. i

A plurality of similar ring sections 2li are carried by the shaft 2l,each ring section having -an interior annular surface 25 of a diameterlarger than the diameter of the shaft, and each ring section has itssidesurfaces recessed, as at 26, Vso that such side surfaces may be readily'machined so as to lie in planes substantially normal to the axis of thering section.

Resilient means is interposed between each ring section 24 and the shaft2l, the resilient means 'urging the ring section to concentricity withrespect to the shaft 2l, yet permitting each ring section toindividually move out of concentricity. In the embodiment hereindisclosed, the resilient means comprises a coil spring 21 having conedends 28 and an intermediate cylindrical portion 23. The extremity ofeach coned end 28 is formed to closely fit about the shaft 2|,substantially at .the side surfaces of the respective ring section,

. 29, so thata greater part of the flexing is done at the connection ofthe intermediate portion with the coned ends. In this manner, theresilient means exes in a predetermined manner, and

proper construction will insure that flexing of the resilient means willnot tend to cock the ring sections to position such as shown in Figure4. It will be appreciated that the spring 21 may be readily removed-from or replaced with respect to its ring section and the shaft withoutdistortion of any of the parts.

Cooking of the ring sections, as shown in Figure 4, is objectionable,since the edges score the hide, and such score lines impair the value ofthe hide. To restrain cooking, my invention provides means for yieldablyholding the ring sections in adjoining side-to-side relationship and tomovement in a direction normal to the axis of the shaft 2|.

In the embodiment herein disclosed, one end of the shaft 2| is providedwith an abutment having a surface disposed in a plane substantiallynormal to the axis of the shaft. Specifically, the abutment is formed bya washer 30 interposed between the exposed side surface of a ringsection at one end of the ring roll and an adjusting nut 3|. A lock nut32 backs up the nut 3| and maintains its position.

At the other end of the ring roll l5, means are provided for yieldablypressing the ring sections against each other. In this embodiment, suchmeans comprises a pair of cup-shaped members 33 and 34, slidably carriedby the shaft 2|, the member 34 telescoping with the member 33 andcooperating therewith to form a closed chamber 35.

A coil spring 36 is interposedbetween the bottoms of the cup-shapedmembers 33, 34, and yieldably presses the member 33 against the exposedside of the adjoining ring member 34 and also presses the member 34against a ,nut 31 threaded on the shaft end 23.- A lock nut 38 maintainsnut 31 in position. The urging force of the spring 36 may be varied byadjustment of the nut 31. `It will be appreciated that the force of thespring 36 will be transmitted through adjoining ring sections 24, thusmaintaininglsuch sections in side-to-side relation which `not onlyprevents foreign matter from entering the interior of the ring sectionsbut also restricts transverse movement of respective ring sections to adirection substantially normal withI respect to the axis of the shaft.

faces of the ring sections 24 with traction providing means, such as theshallow diagonally arranged grooves 33 shown in Figure 4.

From the foregoing, it will be apparent to those skilled in the art thatI have accomplished at least the principal object of my invention, and`it also will be apparent to those skilled in the art that the embodimentherein disclosed may be variously changed and modified, withoutdeparting from the spirit of the invention, and that the invention iscapable of uses and has advantages not herein specifically described;hence it will be appreciated that the herein disclosed embodiment isillustrative only, and that my invention is not limited thereto.

I claim:

1. A ring roll, comprising: a shaft; a ring section disposed about saidshaft; and a coil spring interposed-between said shaft and the interiorsurface of said ring section, said coil spring havin g coned endsfitting said shaft and an intermediate cylindrical portion fitting saidinterior surface, whereby said ring roll and said shaft are urged toconcentric relation, yet are permitted to move out of concentricrelation.

2. A ring roll, comprising: a shaft.; a plurality of ring sectionsdisposed about said shaft; and a Accordingly, it will be appreciatedthat cockl ing of the ring-sections is largely prevented, and the ringsections may move individually, as suggested in Figure 5, to pass anylocally thickened portion of the hide, therefore providing a split inthe hide of uniform thickness without any coil spring interposed betweenthe interior surface of each ring section and said shaft, said coilspring having coned ends fitting said shaft and an intermediatecylindrical portion fitting said interior surface, each of said collsprings 'urging 'respectve ring sections to concentricity with respectto said shaft, yet permitting an individual ring section to be moved'out of concentricity.

3. A ring roll, comprising: a shaft: a ring section disposed about saidshaft; -and resilient means interposed between said shaft and said ringsection, said resilient means urging said ring section to concentricitywith respect to said shaft. yet permitting said ring section to be movedout of concentricity, said resilient means having end portionsengageable only with said sh'aft and an intermediate portion havingengagement only with theinterior surface of said ring section.

4. A ring roll, comprising: a shaft; a plurality of ring sectionsdisposed about said shaft, each being movable transversely of the axisof said shaft; and means carried by said shaft for yieldably holdingsaid ring sections to movement substantially normal with respect to theaxis of said shaft, comprising a pair of telescoping cup sectionscarried by said shaft and resilient means interposed between said cupsections.

5. A ring roll, comprising: a shaft having an abutment including a'surface substantially normal to th'e axis of said shaft; a plurality 0fring sections disposed about said shaft in slde-to-slde relationship,each ring section having itssldes disposed in planes substantiallynormalto its axis, and being movable transversely of the axis of said shaft,the ring section at one end of said ring roll having its exposed sidebearing against said abut'- ment surface; and means yieldably pressingagainst the exposed side of the ring section at the other end of saidring roll, the pressure being transmitted through adjoining ringsections, whereby the ring sections are yieldably held in side-to-sideengagement and to transverse movement substantially normal with respectto the axis damaging blemishes or markings. In some@ cases, as forinstance when the hides are wet, it may be desirable t0 provide theexterior sui'- of said shaft, said pressing means comprising a pair oftelescoping cup members and resilient means interposed between said cupmembers.

6. A ringy roll. comprising: a shaft; a plurality transversely withrespect to the axis of-said shaft. l.

7. A ring roll, comprising: a shaft; a ring section disposed about saidshaft; and a coil spring interposed between said shaft and the interior'surface of said ring section, said coil spring lhaving coned endsclosely fitting said shaft and an intermediate cylindrical portionclosely fitting said interior surface, said coil spring, said ringsection,

' and said shaft being semblable `and disusemblable without distortiono! any part thereof.

Louis D. CLARK REFERENCES CITED The following references are of recordin the nie of this patent:

UNITED STATES PATENTS Number Name Date 523,290 McCay et al July 17, 1894905,111 Stehling Nov;l 24, 1908 1,192,540 Libert July 25, 1916 1,210,401Bergstrom 1 Jan. 2, 1917 1,434,019 Meyer Oct. 31, 1922 1,586,100 MeyerOct. 31, 1922

